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(strfry): Make result more random.

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This commit is contained in:
Ulrich Drepper
2007-05-08 03:27:35 +00:00
parent 37f402350d
commit c306d80735
1 changed files with 4 additions and 6 deletions
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10
string/strfry.c
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@@ -1,4 +1,4 @@
/* Copyright (C) 1992, 1996, 1999, 2002 Free Software Foundation, Inc. /* Copyright (C) 1992, 1996, 1999, 2002, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or The GNU C Library is free software; you can redistribute it and/or
@@ -37,16 +37,14 @@ strfry (char *string)
init = 1; init = 1;
} }
len = strlen (string); len = strlen (string) - 1;
for (i = 0; i < len; ++i) for (i = 0; i < len; ++i)
{ {
int32_t j; int32_t j;
char c;
__random_r (&rdata, &j); __random_r (&rdata, &j);
j %= len; j = j % len + 1;
c = string[i]; char c = string[i];
string[i] = string[j]; string[i] = string[j];
string[j] = c; string[j] = c;
} }